Strip URL parameters when creating base URL.

The problem arose from links produced by Marketo which took the
following form:

    http://docs.sencha.com/architect/2-0/?mkt_tok=LONGHASH#!/guide

Now we're stripping all URL parameters after the question mark, leaving
just the path and hash-bang parameters.

template/app/controller/Content.js

@@ -37,6 +37,6 @@ Ext.define('Docs.controller.Content', {
      * @return {String} URL
      */
     getBaseUrl: function() {
-        return document.location.href.replace(/\/?(index.html|template.html)?#.*/, "");
+        return document.location.href.replace(/\/?(index.html|template.html)?(\?[^#]*)?#.*/, "");
     }
 });